Optimal probiotics for your gut health with ARKTIBIOTIC SELECT Please note that dietary supplements are not a substitute for a balanced and varied diet and a healthy lifestyle. Probiotics, also known as lactic acid bacteria supplements, derive from the Latin pro bios, meaning for life. These live microorganisms, including bacteria and lactic acid bacteria, are part of the natural human gut flora. How do lactic acid bacteria support your gut? These microorganisms are essential companions in your digestive tract. They produce lactic acid, which maintains the acidic environment of the intestines. A low pH level can inhibit the growth of unwanted bacteria. The advantages of ARKTIBIOTIC SELECT With ARKTIBIOTIC SELECT you receive six different bacterial strains in combination with vitamin D. Vitamin D contributes to the normal function of the immune system.